题目内容
us. It makes your heart and body s (2). Children who often exercise are more alert (灵活的).
This means they do better in tests and schoolwork than those who don't exercise.
There are many w (3) to exercise. You can walk, run, swim, skate, or play ball games. Make sure
you e (4) in the following ways: you have to like what you're doing. Exercise enough - but not
too m (5). It's best to exercise t (6) each week. Thirty minutes each time is enough.
Try all kinds of things until you find one, two or even three sports that feel r (7) for you.
You can exercise at fitness centers (健身中心). They have l (8) of equipment (设备) there.
The equipment will help exercise your arms, legs and other parts of your body to make you f (9).
Some people buy equipment for their homes. But it is very expensive.
Exercising can be fun. Friends can exercise t (10) at a fitness center, or they can play
sports together. How do you exercise?
| 从方框中选择正确的单词填空。 | |
First, by __1__ we can enjoy the beautiful scenery (风景) of different places. We can see many places |
| 选词填空。 | |
根据短文内容,用方框中所给的单词填空。
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| What is the greenhouse(温室)effect? Have you ever been inside agreenhouse, the allglass building where plants are 1 ?It's very warm, because the glass walls allow the sun's rays(光线)in but keep the heat from getting out. Think of the earth as being 2 a large green-house. The gases act like a greenhouse's glass walls-they keep the heat from getting out into space,and the earth stays warm. Try,this easy 3 :Take two jars (大口瓶) and put a teaspoon of water in each jar. Put a lid (盖子) on just one jar. Place __4 jars in a aunny place. After a few hours,check on the jars. You'll see that the open jar hasn't changed,but the closed jar will be hot inside. What happened? The heat from the sun 5 not get out from the closed jar. |